20220229 has 4 divisors (see below), whose sum is σ = 20297376. Its totient is φ = 20143084.

The previous prime is 20220217. The next prime is 20220247. The reversal of 20220229 is 92202202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92202202 = 2 ⋅46101101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20220229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38179 + ... + 38704.

It is an arithmetic number, because the mean of its divisors is an integer number (5074344).

Almost surely, 2^20220229 is an apocalyptic number.

It is an amenable number.

20220229 is a deficient number, since it is larger than the sum of its proper divisors (77147).

20220229 is an equidigital number, since it uses as much as digits as its factorization.

20220229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77146.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20220229 is about 4496.6908944245. The cubic root of 20220229 is about 272.4344493452.

It can be divided in two parts, 20220 and 229, that added together give a square (20449 = 143²).

The spelling of 20220229 in words is "twenty million, two hundred twenty thousand, two hundred twenty-nine".